Mechanisms of Hearing Loss in a Guinea Pig Model of Superior Semicircular Canal Dehiscence

Figure 4

Vibration of the tympanic membrane (a), stapes head (b), round window (c), and the dehiscence (d), detected by LDV presurgery (black baseline) and postsurgery (red line) and after the dehiscence was repaired (blue line) (). (a) The presence of dehiscence (red line) statistically significantly () increased the vibration of the tympanic membrane, in the range of 300–1500 Hz. The increase showed an offset after the dehiscence was repaired after surgery (blue line). (b) The presence of the dehiscence (red line) increased the vibration of the staples head, whereas it decreased the inner ear impedance statistically significantly () in the range of 300–3000 Hz. This increase showed an offset after the dehiscence was repaired. (c) The presence of the dehiscence (red line) decreased vibration in the round window membrane statistically significantly (), in the range of 300–3000 Hz, which was offset after the dehiscence was repaired (blue line). (d) The vibration of the dehiscence located at the superior semicircular canal increased statistically significantly () after the dehiscence was created, in the range of 300–2000 Hz. This increase showed an offset after the dehiscence was repaired.

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